That’s hardly an option — which other device has similarly good hardware and that good privacy?
The only possibility would be a GrapheneOS-installed pixel, but the pixel is nowhere near an iphone in terms of hardware and besides all the unacceptable hardware bugs, google simply doesn’t seem to want to sell it to people. (Most of the EU is not a target for some insane reason).
The real solution is government intervention, which will allow sideloading.